The House on Tuesday advanced a major financial overhaul of the ailing U.S. Postal Service, relieving it of tens of billions of dollars in liabilities that agency leaders said prevented it from modernizing and providing efficient service, the Washington Post reported. The bill, which passed 342-92, marks a major breakthrough for the mail agency and Postmaster General Louis DeJoy, who made the legislation the centerpiece of his 10-year postal restructuring plan. The Postal Service has implored Congress to help fix its balance sheet for nearly 15 years, and agency leaders are cautiously optimistic about prospects for the Postal Service Reform Act in the Senate. It has 27 co-sponsors in the upper chamber, including 14 Republicans, sufficient support to defeat a potential filibuster. Senate Majority Leader Charles E. Schumer (D-N.Y.) said that the chamber would vote on the legislation by the end of next week, citing its bipartisan popularity. The Postal Service is required to prepay its retirees’ health-care costs, a mandate instituted in 2006 when mail volume was steady and the agency was profitable. But decades of falling mail use have turned it into a perpetual financial loser, and the pre-funding requirement has accounted for $152.8 billion of its $206.4 billion in liabilities. Tuesday’s legislation, advanced by leaders of both parties, wipes clean $57 billion of that amount, and will save the agency another $50 billion over the next decade. The bill installs new timely delivery transparency requirements for the Postal Service, which has struggled with on-time service since DeJoy took office, and allows the agency to contract with local, state and Indigenous governments to offer basic nonpostal services, such as hunting and fishing licenses.